Cpu Overload Warning Mail From Cpanel

i am continously getting warning mail form cpanel cpu watch that my cpu got overloaded as like follows,

IMPORTANT: Do not ignore this email.
This is cPanel cpuwatch on xxx.com!
While processing, the cpu has been
maxed out for more than a 6 hour period. The current load/uptime line on the server at the time of
this email is
19:05:10 up 143 days, 20:38, 0 users, load average: 1.11, 0.69, 0.63
You should check the server to see why the load is so high and take
steps to lower the load. If you want stats to continue to run even with a high load; Edit
/var/cpanel/cpanel.config and change extracpus to a number larger then 0 (run
/usr/local/cpanel/startup afterwards to pickup the changes).

I searched on load average and found that average load for 1 cpu is 2 and default value is 5 to 10.but here i am getting mail for 1.11 itself.I changed the value of threshold of load average in stat and logs of tweak setting to 4.but no improvement.now also i am getting more than 4 mails for average load i.e 1.23 also

My questions are:

1)what is the criteria cpanel is checking for sending cpu-watch warning mail?

2)i am getting nothing more than rsync and exim at the time of overload(while using TOP command).So why now only i am getting warning mail?
what is the cause of this problem?

I was getting idea from internet to create account without stat/ log analyse function .But not sure how will it work and afraid of doing this.......